Teachers, too, have soured on the Common Core. Just a year ago, 76% of teachers backed the Common Core, but the portion in favor has now plummeted to 46%. Meanwhile, teacher opposition has more than tripled, from 12% to 40%. Once again, signs of polarization are evident, with positive views expressed by Republican teachers falling by 34 points, from 69% in 2013 to 35% in 2014, while among Democratic teachers the percentage has slipped only 15 points, from 69% to 54%.